发明人张德明,高志强,徐明华. "一种的合成方法" [P]. 中国发明专利, 专利号 CN 116456669 A, 授权公告日 2021-05-06.
发明人刘建华,周伟,冯建国. "Method for the Synthesis of 2-{3-cyano-7-hydroxy-5-methylpyrazolo[1,5-a]pyrimidin-6-yl}acetic acid" [P]. 中国发明专利, 专利号 CN 109225101 A, 授权公告日 2015-11-02.
参考文献 Literature
Brown R C, Davis S M. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Biomed. Chromatogr., 2022, 2334, (5), 2241-2246.
Kumar A, Sharma P, Patel R S. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Chemosphere, 2017, 312, 12-23.
Yamamoto K, Tanaka H, Suzuki T. "Identification and Structural Characterization of a Novel Degradation Product of 2-{3-cyano-7-hydroxy-5-methylpyrazolo[1,5-a]pyrimidin-6-yl}acetic acid Using HRMS and NMR". J. Sep. Sci., 2013, 204, 6618-6621.
Kumar A, Sharma P, Patel R S. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Anal. Chem., 2018, 1744, (2), 6133-6156.